That was my original thought too. The question is if I use the KF4 wing what are the limitations to it going past 100mph? What exactly is the limiting issue(s) with the KF3 VNE, windscreen, spars, wing construction, spar carry-through, tail, wing struts? James

Hello, Just picked up a pretty much untouched K3 kit #807. I'm the 4th owner. Controls are in the fuselage and that's about it. I plan on a 912, 80 or 100hp whichever I find at the right time. I'll also be going with a Grove gear setup. Planning on the widebody mod, 4 control system, increased area rudder & elevator, electric pitch trim and a glass panel. The covering will be Stewarts glues, Superflite cloth, Airtech primer and likely Aerothane topcoat. This is the same system Ran's uses and Randy's planes always look great. I may just go all waterborne too so who knows right now. Will have a few parts for sale shortly, 13g fiberglass right wing tank, 6g aluminum left wing tank and the bungee gear. James